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Last night the A-listers dressed up to the nines and attended the American Music Awards - the biggest fan-voted award show. Gigi Hadid played host, alongside Jay Pharoah, and there were performances from Justin Bieber, John Lengend, Ariana Grande and Nicki Minaj, Bruno Mars and The Weeknd. Among the winners were Selena Gomez, Beyonce, Adele, Ariana Grande, Zayn and Justin Bieber. Rihanna took home three awards: Favourite Soul/R&B Female Artist, Favourite Soul/R&B Album (for 'Anti') and Favourite Soul/R&B Song (for 'Work' ft. Drake).
Pop princess Selena won the award for Favourite Pop/Rock Female Artist and gave an inspirational and heartfelt speech about her battle with mental health. She looked beautiful in a understated red Prada dress and Giuseppe Zanotti heels.
Supermodel Gigi Hadid made 10 outfit changes throughout the evening. Our favourites were her white lace Roberto Cavalli gown and her Jessica Rabbit-esque floor-length sequin gown by Atelier Versace.
The boys brushed up well too. Ex-Directioners Niall Horan and Zayn Malik both attended the award ceremony, with Niall performing his new solo song, 'This Town', and Zayn collecting an award for New Artist Of The Year. It wasn't certain how harmonious the boys were though, as Zayn made a little dig at Niall and the other former One Direction members whilst collecting his award, saying, 'Wow. This just has my name on it, right?'.
See all the best-dressed A-listers in the gallery below
AMAs: Best Dressed
1 of 10ama best dressed
Chrissy Teigan wowed on the red carpet in a black gown that had a thigh slit going up past her hips.
2 of 10ama best dressed
Ariana Grande won the award for Artist Of The Year and wore a lace bralet and ivory trousers.
3 of 10ama best dressed
New-mum Behati Prinsloo attended the AMAs looking gorgeous in a low-cut asymmetric black dress.
4 of 10ama best dressed
Singer Hailee Steinfield wore a plunging emerald sequin-embellised gown on the red carpet.
5 of 10ama best dressed
Keke Palmer channelled Bella Hadid's birthday outfit and Rihanna's CFDA outfit in a gold mesh crop co-ord and baby pink faux-fur coat.
6 of 10ama best dressed
Niall Horan looked suave on the red carpet in a grey and white checked suit.
7 of 10ama best dressed
Joan Smalls looked elegant on the red carpet in a floral contrast floor-length gown by Roberto Cavalli.
8 of 10ama best dressed
Girl-of-the-evening Selena Gomez looked stunning in a red floor-length Prada gown, Cartier jewellery and Giuseppe Zanetti heels.
9 of 10ama best dressed
Gigi Hadid looked flawless on the red carpet in a white off-shoulder lace gown by Roberto Cavalli, and slicked back hair.
10 of 10ama best dressed
On the red carpet Halsey wore a white jumpsuit by Ermanno Scervino. She later performed 'Closer' with The Chainsmokers.
READ MORE: Selena Gomez Delivers A Moving Speech On Her Battle With Depression